package com.hdy.web.config;

import org.springframework.web.servlet.HandlerInterceptor;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

public class LoginHandlerInterceptor implements HandlerInterceptor {
    @Override
    public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
        String userName = (String) request.getSession().getAttribute("userName");
        if(userName==null){
            request.setAttribute("msg","无用户权限，请先登录！");
            request.getRequestDispatcher("/signin").forward(request,response);
            return false;
        }else {
            return true;
        }
    }
}
